51 lines
1.9 KiB
Markdown
51 lines
1.9 KiB
Markdown
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---
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layout: default
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title: cat nodes
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parent: CAT
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grand_parent: REST API reference
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nav_order: 40
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has_children: false
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---
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# cat nodes
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The cat nodes operation lists node-level information, including node roles and load metrics.
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A few important node metrics are `pid`, `name`, `master`, `ip`, `port`, `version`, `build`, `jdk`, along with `disk`, `heap`, `ram`, and `file_desc`.
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## Example
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```
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GET _cat/nodes?v
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```
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## Path and HTTP methods
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```
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GET _cat/nodes
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```
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## URL parameters
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All cat nodes URL parameters are optional.
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In addition to the [common URL parameters]({{site.url}}{{site.baseurl}}/opensearch/rest-api/cat/index#common-url-parameters), you can specify the following parameters:
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Parameter | Type | Description
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:--- | :--- | :---
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bytes | Byte size | Specify the units for byte size. For example, `7kb` or `6gb`. For more information, see [Supported units]({{site.url}}{{site.baseurl}}/opensearch/units/).
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full_id | Boolean | If true, return the full node ID. If false, return the shortened node ID. Defaults to false.
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local | Boolean | Whether to return information from the local node only instead of from the master node. Default is false.
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master_timeout | Time | The amount of time to wait for a connection to the master node. Default is 30 seconds.
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time | Time | Specify the units for time. For example, `5d` or `7h`. For more information, see [Supported units]({{site.url}}{{site.baseurl}}/opensearch/units/).
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include_unloaded_segments | Boolean | Whether to include information from segments not loaded into memory. Default is false.
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## Response
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```json
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ip | heap.percent | ram.percent | cpu load_1m | load_5m | load_15m | node.role | master | name
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172.18.0.3 | 31 | 97 | 3 | 0.03 | 0.10 | 0.14 dimr | * | odfe-node2
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172.18.0.4 | 45 | 97 | 3 | 0.19 | 0.14 | 0.15 dimr | - | odfe-node1
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```
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